Does NSPointerArray support zeroing weak references under ARC
Does NSPointerArray support zeroing weak references under ARC
- Subject: Does NSPointerArray support zeroing weak references under ARC
- From: Jonathan Mitchell <email@hidden>
- Date: Sat, 09 Aug 2014 07:53:57 +0100
Does NSPointerArray support zeroing weak references under ARC?
The test below seems to indicate that it does - though this is the sort of thing I often get wrong.
Note that a NULL survives -compact.
Presumably the method is free to not compact in trivial cases - or is there another explanation?
int main(int argc, const char * argv[])
{
NSPointerArray *parray = [NSPointerArray weakObjectsPointerArray];
NSString *value1 = [NSString stringWithUTF8String:"test1"];
[parray addPointer:(__bridge void *)(value1)];
@autoreleasepool {
NSString *value2 = [NSString stringWithUTF8String:"test2"];
[parray addPointer:(__bridge void *)(value2)];
for (id item in parray) NSLog(@"%@", item);
NSLog(@"Draining pool...");
}
for (id item in parray) NSLog(@"%@", item);
NSLog(@"Compacting...");
[parray compact];
for (id item in parray) NSLog(@"%@", item);
return 0;
}
output:
2014-08-08 17:41:54.982 WeakObjectsPointerArray[22437:303] test1
2014-08-08 17:41:54.984 WeakObjectsPointerArray[22437:303] test2
2014-08-08 17:41:54.985 WeakObjectsPointerArray[22437:303] Draining pool...
2014-08-08 17:41:54.985 WeakObjectsPointerArray[22437:303] test1
2014-08-08 17:41:54.986 WeakObjectsPointerArray[22437:303] (null)
2014-08-08 17:41:54.986 WeakObjectsPointerArray[22437:303] Compacting...
2014-08-08 17:41:54.986 WeakObjectsPointerArray[22437:303] test1
2014-08-08 17:41:54.987 WeakObjectsPointerArray[22437:303] (null)
Thanks
Jonathan
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden